﻿#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Lib.JSON.Utilities;
using System.Globalization;

namespace Lib.JSON.Linq
{
  /// <summary>
  /// Represents a JSON constructor.
  /// </summary>
  public class JConstructor : JContainer
  {
    private string _name;
    private readonly IList<JToken> _values = new List<JToken>();

    /// <summary>
    /// Gets the container's children tokens.
    /// </summary>
    /// <value>The container's children tokens.</value>
    protected override IList<JToken> ChildrenTokens
    {
      get { return _values; }
    }

    /// <summary>
    /// Gets or sets the name of this constructor.
    /// </summary>
    /// <value>The constructor name.</value>
    public string Name
    {
      get { return _name; }
      set { _name = value; }
    }

    /// <summary>
    /// Gets the node type for this <see cref="JToken"/>.
    /// </summary>
    /// <value>The type.</value>
    public override JTokenType Type
    {
      get { return JTokenType.Constructor; }
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="JConstructor"/> class.
    /// </summary>
    public JConstructor()
    {
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="JConstructor"/> class from another <see cref="JConstructor"/> object.
    /// </summary>
    /// <param name="other">A <see cref="JConstructor"/> object to copy from.</param>
    public JConstructor(JConstructor other)
      : base(other)
    {
      _name = other.Name;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="JConstructor"/> class with the specified name and content.
    /// </summary>
    /// <param name="name">The constructor name.</param>
    /// <param name="content">The contents of the constructor.</param>
    public JConstructor(string name, params object[] content)
      : this(name, (object)content)
    {
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="JConstructor"/> class with the specified name and content.
    /// </summary>
    /// <param name="name">The constructor name.</param>
    /// <param name="content">The contents of the constructor.</param>
    public JConstructor(string name, object content)
      : this(name)
    {
      Add(content);
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="JConstructor"/> class with the specified name.
    /// </summary>
    /// <param name="name">The constructor name.</param>
    public JConstructor(string name)
    {
      ValidationUtils.ArgumentNotNullOrEmpty(name, "name");

      _name = name;
    }

    internal override bool DeepEquals(JToken node)
    {
      JConstructor c = node as JConstructor;
      return (c != null && _name == c.Name && ContentsEqual(c));
    }

    internal override JToken CloneToken()
    {
      return new JConstructor(this);
    }

    /// <summary>
    /// Writes this token to a <see cref="JsonWriter"/>.
    /// </summary>
    /// <param name="writer">A <see cref="JsonWriter"/> into which this method will write.</param>
    /// <param name="converters">A collection of <see cref="JsonConverter"/> which will be used when writing the token.</param>
    public override void WriteTo(JsonWriter writer, params JsonConverter[] converters)
    {
      writer.WriteStartConstructor(_name);

      foreach (JToken token in Children())
      {
        token.WriteTo(writer, converters);
      }

      writer.WriteEndConstructor();
    }

    /// <summary>
    /// Gets the <see cref="JToken"/> with the specified key.
    /// </summary>
    /// <value>The <see cref="JToken"/> with the specified key.</value>
    public override JToken this[object key]
    {
      get
      {
        ValidationUtils.ArgumentNotNull(key, "o");

        if (!(key is int))
          throw new ArgumentException("Accessed JConstructor values with invalid key value: {0}. Argument position index expected.".FormatWith(CultureInfo.InvariantCulture, MiscellaneousUtils.ToString(key)));

        return GetItem((int)key);
      }
      set
      {
        ValidationUtils.ArgumentNotNull(key, "o");

        if (!(key is int))
          throw new ArgumentException("Set JConstructor values with invalid key value: {0}. Argument position index expected.".FormatWith(CultureInfo.InvariantCulture, MiscellaneousUtils.ToString(key)));

        SetItem((int)key, value);
      }
    }

    internal override int GetDeepHashCode()
    {
      return _name.GetHashCode() ^ ContentsHashCode();
    }

    /// <summary>
    /// Loads an <see cref="JConstructor"/> from a <see cref="JsonReader"/>. 
    /// </summary>
    /// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JConstructor"/>.</param>
    /// <returns>A <see cref="JConstructor"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
    public static new JConstructor Load(JsonReader reader)
    {
      if (reader.TokenType == JsonToken.None)
      {
        if (!reader.Read())
          throw new Exception("Error reading JConstructor from JsonReader.");
      }

      if (reader.TokenType != JsonToken.StartConstructor)
        throw new Exception("Error reading JConstructor from JsonReader. Current JsonReader item is not a constructor: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));

      JConstructor c = new JConstructor((string)reader.Value);
      c.SetLineInfo(reader as IJsonLineInfo);

      c.ReadTokenFrom(reader);

      return c;
    }
  }
}